18063994 has 16 divisors (see below), whose sum is σ = 29282400. Its totient is φ = 8308080.

The previous prime is 18063977. The next prime is 18064009. The reversal of 18063994 is 49936081.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7557 + ... + 9655.

It is an arithmetic number, because the mean of its divisors is an integer number (1830150).

Almost surely, 2^18063994 is an apocalyptic number.

18063994 is a deficient number, since it is larger than the sum of its proper divisors (11218406).

18063994 is a wasteful number, since it uses less digits than its factorization.

18063994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2445.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 18063994 is about 4250.1757610715. The cubic root of 18063994 is about 262.3843493572.

The spelling of 18063994 in words is "eighteen million, sixty-three thousand, nine hundred ninety-four".